Higher Order Harmonic Signature Analysis for Loudspeaker Defect Detection

Anthony J, Celmer R, Foley D, Pagliaro T, Sachwald B, Thompson S. Higher Order Harmonic Signature Analysis for Loudspeaker Defect Detection. In: AES Convention 117. Audio Engineering Society; 2004. Paper 6251. Available from: https://aes.org/publications/elibrary-page/?id=12908

@inproceedings{Anthony2004_12908,
  author = {Anthony, Jamie and Celmer, Robert and Foley, Dan and Pagliaro, Tony and Sachwald, Benjamin and Thompson, Shane},
  title = {{Higher Order Harmonic Signature Analysis for Loudspeaker Defect Detection}},
  booktitle = {AES Convention 117},
  note = {Paper 6251},
  year = {2004},
  month = oct,
  publisher = {Audio Engineering Society},
  url = {https://aes.org/publications/elibrary-page/?id=12908}
}

TY  - CPAPER
TI  - Higher Order Harmonic Signature Analysis for Loudspeaker Defect Detection
AU  - Anthony, Jamie
AU  - Celmer, Robert
AU  - Foley, Dan
AU  - Pagliaro, Tony
AU  - Sachwald, Benjamin
AU  - Thompson, Shane
T2  - AES Convention 117
M1  - Paper 6251
PY  - 2004
DA  - 2004/10/06
UR  - https://aes.org/publications/elibrary-page/?id=12908
PB  - Audio Engineering Society
LA  - en
AB  - Loudspeaker assembly faults, such as a rubbing voice coil, bent frame, loose spider, etc., have traditionally been detected using experienced human listeners at the end of a production line. Previous attempts to develop production measurement systems for on-line testing typically analyze only low-order harmonics for the primary purpose of measuring total harmonic distortion (THD), and thus are not specifically designed to detect defective rub, buzz, and ticking sounds. This paper describes a new method wherein the total energy of high-order harmonics groups, for example, 10th through the 20th or 31st through the 40th, are measured and analyzed. By grouping high-order harmonics and resolving their respective total energies, distinct signatures can be obtained that correlate to the root cause of audible rub and buzz distortions (Temme, 2000). The paper discusses loudspeakers tested with specific defects, as well as results of a computer-based electroacoustic measurement and analysis system used for detection.
ER  -